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Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (4): 1038-1056.doi: 10.16420/j.issn.0513-353x.2025-1229

• Research on Arbuscular Mycorrhizal Fungi in Horticultural Plants • Previous Articles     Next Articles

Mechanism of Synergistic Alleviation of Apple Replant Disease by Arbuscular Mycorrhizal Fungi and Talaromyces pinophilus LZ1

GAO Yawen1, SUN Linjiao1, LIU Yusong1, SUN Wentai2, XU Mingna3, SONG Lefen1, WANG Xuemei1, WANG Gongshuai4, WANG Mei1,*(), YIN Chengmiao1,*(), MAO Zhiquan1,*()   

  1. 1 College of Horticultural Science and Engineering,Shandong Agricultural University,Tai'an,Shandong 271018,China
    2 Institute of Forestry,Fruit and Floriculture,Gansu Academy of Agricultural Sciences,Lanzhou 730070,China
    3 Longkou Agricultural Technology Extension Center,Yantai,Shandong 265700,China
    4 College of Agricultural Science and Technology,Shandong Agriculture and Engineering University,Zibo,Shandong 255300,China
  • Received:2025-12-15 Revised:2026-03-12 Online:2026-04-25 Published:2026-04-20
  • Contact: WANG Mei, YIN Chengmiao, MAO Zhiquan

Abstract:

This study aimed to develop a green and sustainable biocontrol strategy for apple replant disease(ARD)by exploring the alleviating effect of combined application of an arbuscular mycorrhizal fungi(Paraglomus sp. SW1)and an antagonistic Talaromyces pinophilus LZ1 on ARD. The results showed that the LZ1 strain isolated from the rhizosphere of chestnut not only significantly inhibited the growth of the main pathogenic Fusarium species causing ARD,but also increased the mycorrhizal colonization rate in apple seedlings grown in replant soil. Validation through greenhouse,pot,and field experiments revealed that the combined application of AMF and LZ1 significantly enhanced the biomass and mycorrhizal colonization in apple plants under replant soil. Compared with the replant control soil treatment without any microbial inoculants(CK-1),plant height,ground diameter,fresh weight,dry weight,and mycorrhizal colonization rate increased by 85.43%,88.20%,144.47%,145.40%,and 62.94%,respectively. The co-inoculation of AMF and LZ1 also significantly increased soil spore density and easily extractable glomalin-related soil protein(EE-GRSP)content,which were 59.87% and 46.98% higher than those in CK-1,respectively. Furthermore,the co-inoculation improved soil enzyme activities and optimized the soil microbial community structure. In summary,the synergistic application of AMF and LZ1 can provide a sustainable and eco-friendly strategy for alleviating ARD.

Key words: apple, replant disease, arbuscular mycorrhizal fungi, Talaromyces pinophilus LZ1, biocontrol, soil microbial community